Machine for rossing logs



'(No Model.)

EQQHARGRAVB. MACHINE FOR ROSSING LOGS.

No. 540,980. Patented Jim@ 11,- 1895.

- l InuEnT I I C. UVa/L M IWW www# l j l LUTLE55E5 lIc NITED STATES PATENT GFFICE.

EDWARD o. IIARGRAVE, on BAY CITY, MICHIGAN.

MACHINE FOR ROSSING LOGS.

SPECIFICATION forming part of Letters Patent No. 540,980, dated June 1.1, 1895.

l Application filed April 1I, 1893. Serial No. 469,974. (No model.)

To @ZZ whom, t puny cori/cern:

Be it known that I, EDWARD O. HARGRAVE,

of Bay City, in the county of Bay and State of Michigan, have invented a new and useful y Improvement in Machines for Rossing Logs, of which the following is a specification.

My invention relates to machines or apparatus for rossing or removing the bark from logs, and it has for its object to provide an efficient apparatus of novel and simpleconstruction by means of which the bark is rapidly removed by the rubbing, breaking or grinding action of an instrument moving in contact therewith and provided with bluntas contradistinguished from saw or cutting teeth.

To this end my invention consists in the novel apparatus herein described and then pointed out in claims, reference being made to the accompanying drawings, in which- Flgure 1 1s an end elevation of my improved machine; Fig. 2, a top plan View thereof, and

Fig. 3 a detached perspective of one of the blunt-toothed instruments.

In the said drawings the letter A designates the base of the machine and Btop timbers supported upon uprights C. i

The letter c represents a driving pulley carrying a pinion e which meshes with the large gear wheel D secured to 'acrank shaft d, upon which are arranged two cranks, said shaft being journaled in the frame of the machinel and being made of any length required for the work to be done.

E and E represent two rock shafts journaled in boxes e e on the cross'timbers B of the upper frame of the machine.

F represents a pitman which is at one end connected with one of the cranks on the shaft d, and at its opposite end is pivoted to one end of an arm f, the other end of which is secured to the rock shaft E.

Fr represents a similar pitman which at one end is connected to the second crank on the shaft d and at its opposite end is pivoted to an arm f', shown in dotted lines-in Fig. 1,

' posite each other or at an angle of one hundred and eighty degrees from each other so as to give reverse motions to the rock shafts E and E.

A pair of depending arms G are carried by the rock shaft E and secured to the rock shaft VE are a pair of similar depending arms G', said arms G and Galternating throughout the length of the machine, as clearly shown in Fig. 2.l Each arm G and G is pivoted at its lower end to one endet a bar H or H', the other end of which carries one o r a series of toothed rubbing, grinding or breaking instruments I, said toothed instruments. being so constructed that they are not saw or cuttingv blades, properly speaking, that is to say, they have not what are recognized as saw teeth, but are properly rubbing, breaking or grinding teeth. In this arrangement, by reason of the reverse motions imparted to the rock shafts E and E through the .pitmen F F the arms G of one'set or series move in one direction instrument I, and by reason of the pivotalattachment ofthe rear ends of the bars H H to the depending arms G G the rubbing, break- Ing or grinding instruments I are capable of yielding to closely follow the contour or irregularities of the log being operated upon.

I prefer to construct the bars H and H of two or` three members each member being separate and provided with independent instruments I, so' that each may play up and down independently of its neighbors and thus increase the capability of the instruments I to closely follow the inequalities or irregularities in a log, as shown in Fig. 2.

J .T represent two toothed Wheels or'cylinders carried on shafts j running through the machine, these wheels being preferably duplicated at the two ends of the machine as shown in Fig. 2, and each of these shaftsj is provided at one end with a gear-Wheel K, both of which mesh with a single pinion la so as to turn in the Asame direction, whereby a log L lying between said two wheels will be rotated. The pinion lo is driven by means of a gear wheel Z on the same shaft which derives motion from the pinion lm, on another shaft on which is arranged a belt pulley M driven by a belt N from the pulley on the shaft d.

The operation of my invention is as follows: A log being in place upon the ltwo wheels J and the machine set in motion, said log is rotated by said Wheels, preferably at a W rate of speed, the driving pulley M being shown larger than its driving pulley, though ofcourse this is not necessary, and at the same time the very rapidly from the log, yielding as occa- 1 sion requires to follow closely the irregularities or inequalities of the log and without in any manner injuring the wood as would be done in prior rossing machines.

I have found by actual use that With this t machine I can ross logs very rapidly and without injuring or Wasting the Wood.

Vthat I claim as my invention, and desire to secure by Letters Patent, is-

Il In a rossing machine the combination with mechanism for supporting a log, of are- Y ciprocatory blunt toothed rubbing, breaking or grinding instrument and mechanism for reciprocating the same in contact with a log whereby the bark of thelog is rubbed, broken or ground oif, substantially as described.

l 2. In a rossing machine the combination with mechanism for supporting a log, ot two reciprocatory, toothed rubbing, breaking or grinding instruments, and means for reciprocatingsaid instruments across the log simultaneously in opposite directions,vsubstantially as shown and described.

3. In a rossing machine the combination with mechanism for supporting a log, of two toothed rubbing,breaking orgrinding instru. ments, and means for moving said instruments across the log simultaneously in opposite directions, substantially as shown and described.

same in contact with av log whereby the iustru.- f ment is capable of yielding to follow the ing equalities or irregularitiesof the log and the bark of the log is rubbed, broken or ground off.

5. In a rossing machine the combination with mechanism for supporting a log, of a plurality of sets of blunt, toothed rubbing, breaking or grinding instruments, each set comprising a plurality of such instruments and means for reciprocating said sets of i11- strnments in opposite directions in contact with a log, substantially as described.

6. In a rossing machine the combination With mechanism for supporting a log of a plurality of sets of yieldingly supported blunt toothedrnbbing,breaking or grindinginstruments, each set comprising a plurality of such instru ments and means for reciprocating said sets of vinstruments in opposite directions in contact with the log, substantially as described.

7. In a rossing machine the combination with mechanismfor supporting and rotating alog,of rubbing, breaking orgrinding instruments I connected alternately with rock shafts E and E' and means for rocking said shafts substantially as described.

8. In arossing machine t'or rossing logs the combination with mechanism for supporting a log of bars I-I and H each ot' which is composed ot' a plurality of members, each meniber carrying a rubbing, breaking or grinding instrument independently capable of rising and falling and means for reciprocating said bars, substantially as described.

9. In a rossing machine, the combination with mechanism for supporting a log of a blunt-toothed, rubbing, breaking or grinding instrument pivotally supported so as to be capable of yielding to` inequalities or itregut lai-ities in the log, and means for reciprocatz ing said instrument in contact with a log so` that the bark of the log is rubbed, broken or ground olf.

10. In a rossiug machine the combinationy `with mechanism for supporting a log of a L blnnttoothed, rubbing,.breaking or grinding instrument pivotally supported so as t0 be capable of yielding to inequalities or irregularities in the log, and means for moving saidy 'instrument in contact with a log so that. thev f bark of the'log is rubbedbroken or ground off;

EDWARD C. HARGRAVE.. ll/Ttnessesr;

A. B. LENNOX, M. L. COURTRIGHT. 

